The TRUCK-LOCK® Series is a low profile, non-impact design vehicle restraint featuring the HYDRA-FLOAT™ system, a large spring-loaded barrier that automatically adjusts to various truck heights, maintaining positive contact during loading operations at all times. Available in manual or automatic models, these premium restraints can secure trailers with over 32,000 lbs. of restraining force. The barrier housing stores at only 9″ above grade, staying clear of incoming trucks, and has a vertical working range of 30″ above grade to safely engage even that highest of rear impact guards.